This is a sixteen stack of the small mask size in the parent model.
Stack is separated by .2mm.
Quoted description below:

"This mask comes in two sizes, Large, and Medium. Large fits most, Med is for smaller faces. it uses two rubber bands and can accept a wide variety of filters. I recommend Merv 13 or higher furnace filters because of the metal wire which keeps its shape (put two very tiny daps of hot glue on the top and bottom to stop it from falling out). Print nose bumper in TPU. For the rubber bands, I am using two seven inch rubber bands that are cut once and tied on either side thought the holes."

Anet

A8

No

No

"*The Stacks only work for .2 mm layer height. For any other layer height, you need to make sure there is 2 layers of gap. If you where printing at .3mm layer height you should make a .6mm gap (I have not tried it yet but that is what is said). Also for my .2mm layer height, I recommend a .5mm outer layer line width."